no key, how do I start the bike, 1981 kz650

If you connect the brown wire to positive it will bypass the switch and everything will work for the time being.
Steve

By kz1991: From the positive terminals, I run two wires to each coil , and where do I connect them to the coil? Or yellow/red wire?

It helps to mention what motorcycle you have. I'm assuming its the csr, hence the wiring diagram in my previous reply.

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Its a 79 kz 650 Sr , connected the brown wire going up to the switch in the main wire clump , it lit up the lights in the keyswitch, but still won't start

So you have to hot wire the yellow wire.

Does it matter where

The 79 650-SR is pretty much a completely different motorcycle than the CSR & the wiring diagram is going to be different.

Does your motorcycle have the stock ignition switch, handlebar control, wire harness & points ignition?
The SR came with points ignition, so the ign wiring is going to be different than the CSR. The 650B wiring is probably a closer match.


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Yes its an KZ 750 SR . I wasn't sure that it's be different .
Thank you

seen a guy start my 78 1000 with a piece of tin foil in my fuse box that powered it up. good luck